Avoid making him miss you as a way to manipulate him. It's normal to want your ex to miss you when you're gone, especially if you were the one who got dumped. However, focusing too much on making him miss you will probably end up backfiring. You'll get too obsessed by what he thinks, when instead you should be moving on. Give yourself, and him, a break and don't try to manipulate him after you've already broken up.
It's common that someone continues to love a person even though they're no longer in love. It simply means that the passionate feelings she might have once had for you has started to fade, but it doesn't mean that she's stopped caring about you altogether (which is why she still shows care and concern). I suggest figuring out what went wrong and where she started to lose her spark for you and see if you are able to re-ignite that spark again.
So I have spoken a lot about being an independent woman who is confident and can take of herself but sometimes it is a good thing to show a little vulnerability so your man can show his masculinity. Your man wants to feel needed as a MAN sometimes and that’s not just something that is to be shrugged off as being silly, it is in their biological DNA.
It works better with guys you know in real life, but if you’re having trouble getting started then pick your favorite actor. The important part is that you do this once per day, and that you really stick with it. It might not seem like it’s doing much at first, but in reality it’s detoxing your mind consciously and unconsciously from your ex, and putting you in a much better mental state.